a) 3-2x = -7
2x = -7-3
2x = -10
x = -10:2
x = -5
11(x-4) = 3^2 + 2
11x -44 = 9 + 2
11x = 11 + 44
11x = 55
x = 55:11
x =5
(Nu sunt echivalente)
b)6+5x = 2(-3+x)
6+5x = -6 +6x
5x -6x =-6-6
-x = -12 |•(-1)
x = 12
x+18 = 2(-1-x)+8
x+18 = -2 -2x +8
x +2x = 6 -18
3x = -12
x=-12 :3
x= -4
(Nu sunt echivalente)
